Change Password For Outlook Data File. Select your Outlook PST file and click Settings. Which I have forgot.
The Personal Properties dialog box displays. Go to Send Receive settings - CtrlAltS - then click Edit select the account then Account Properties. For Outlook 2007 On the File menu click Data File Management.
On the Account Settings dialog box click the Data Files tab.
Leave the Old Password field blank and enter a New Password and Verify Password. Make sure not to check Save this password in your password list box. Select your Outlook PST file and click Settings. Your title says the Outlook data file password.